Hi @mia-elisenberg,
Thanks for reaching out to us!

I must note that as per our Support Procedures we cannot debug your code. Hence, in your future postings I kindly ask you to try simplifying your code to a minimal viable example, which highlights your question.

Regarding your question, creating keyframes for nodes can be a little trickier comparing to the ordinary objects, but the general data accessing scheme stays the same. @Dunhou has thankfully posted the simplified example for your question, which already shows crucial pieces of how one would access the CTrack, CCurve and CKey for the node port. (@Dunhou I won't get tired showing our appreciation in playing an active role in our community! 😉 ). Namely, you're expected to use GetBaseListForNode to get the BaseList2D element that corresponds to the node you have. Additionally, NimbusBaseInterface.GetDescID can be used to get the DescID of the port. After you have this information, the process of interacting with animation data isn't any different. Your can check the animation examples in our repository: Cinema-4D-Python-API-Examples/scripts/04_3d_concepts/scene_elements
/animation.

The only thing I'd like to point out here is handling color data. Namely, CKey is designed to operate with float values, but Opacity channel works with color data. Hence, you need to create a separate CTrack for each color channel. You basically do this by pushing your DescID one level further to access the elements of your color data. Please find small example below (based on the code shared by @Dunhou):

descLevelsRGB: list[c4d.DescLevel] = [ c4d.DescLevel(c4d.COLOR_R, c4d.DTYPE_REAL, 0), c4d.DescLevel(c4d.COLOR_G, c4d.DTYPE_REAL, 0), c4d.DescLevel(c4d.COLOR_B, c4d.DTYPE_REAL, 0) ] opacityValue: list[float] = [0.55, 0.66, 0.77] # example data to store in the keyframe ctime: c4d.BaseTime = c4d.BaseTime(doc.GetTime().GetFrame(doc.GetFps()), doc.GetFps()) for opacityChannelDescLevel, opacityChannelValue in zip(descLevelsRGB, opacityValue): # Get opacity channel DescID and push it to access color channel channelDescID: c4d.DescID = nimbusRef.GetDescID(opacityPort.GetPath()) channelDescID.PushId(opacityChannelDescLevel) track: c4d.CTrack = c4d.CTrack(opacityPortBL2D, channelDescID) opacityPortBL2D.InsertTrackSorted(track) curve: c4d.CCurve = track.GetCurve() key = c4d.CKey() track.FillKey(doc, opacityPortBL2D, key) # this is optional key.SetValue(curve, opacityChannelValue) key.SetTime(curve, ctime) curve.InsertKey(key)

Cheers,
Ilia

@ferdinand
Thank you for the answer! The problem is solved after I try to find the child of the port according to your answer.

Thank you so much! I couldn't ask for a more thorough response.

Dan

Hello @myosis,

Welcome to the Maxon developers forum and its community, it is great to have you with us!

Getting Started

Before creating your next postings, we would recommend making yourself accustomed with our forum and support procedures. You did not do anything wrong, we point all new users to these rules.

Forum Overview: Provides a broad overview of the fundamental structure and rules of this forum, such as the purpose of the different sub-forums or the fact that we will ban users who engage in hate speech or harassment. Support Procedures: Provides a more in detail overview of how we provide technical support for APIs here. This topic will tell you how to ask good questions and limits of our technical support. Forum Features: Provides an overview of the technical features of this forum, such as Markdown markup or file uploads.

It is strongly recommended to read the first two topics carefully, especially the section Support Procedures: Asking Questions.

About your First Question

All the methods you list simply do not exist (neither in C++ nor in Python), see c4d.utils.Neighbor for the type overview.

⚠ I therefore must assume that you are using an AI, like, for example, ChatGPT, which hallucinated these methods. Please note that we reserve the right to refuse support when confronted with undisclosed AI gibberish, especially for beginner content. Always state when you used an AI to generate code.

Something such as an edge does not exist concretely in our API and many other APIs, i.e., other than for points and polygons, there is no explicit data type for edges which would be stored. Edges are defined implicitly by CPolygon. To filter a selection for edges of a certain length, you would have to convert edge indices to polygon and point indices and then measure the distance between the relevant points.

Cheers,
Ferdinand

Result

074e2ada-a9ce-45b4-800a-acf7e060941a-image.png

Code """Deselects all edges in the edge selection of the active object whose edge length exceeds MAX_EDGE_LENGTH. Must be run as a Script Manager script with an editable polygon object selected. """ import c4d doc: c4d.documents.BaseDocument # The currently active document. op: c4d.BaseObject | None # The primary selected object in `doc`. Can be `None`. MAX_EDGE_LENGTH: float = 25.0 # The maximum length of an edge before to be considered too long. MAX_EDGE_LENGTH_SQUARED: float = MAX_EDGE_LENGTH ** 2 # The square of `MAX_EDGE_LENGTH`. def main() -> None: """Called by Cinema 4D when the script is being executed. """ if not op or not op.IsInstanceOf(c4d.Opolygon): raise ValueError("The selected object is not a polygon object.") # Get the edge selection of the object and turn it into a list of selected edges indices. Also, # get the points and polygons of the object. selection: c4d.BaseSelect = op.GetEdgeS() selectedEdges: list[int] = [i for i in range(op.GetEdgeCount()) if selection.IsSelected(i)] points: list[c4d.Vector] = op.GetAllPoints() polygons: list[c4d.CPolygon] = op.GetAllPolygons() def getPointByIndex(poly: c4d.CPolygon, index: int) -> c4d.Vector: """Returns the point of the polygon at the given index. CPolygon has no index access, so we fix that here. """ if index == 0: return points[poly.a] elif index == 1: return points[poly.b] elif index == 2: return points[poly.c] elif index == 3: return points[poly.d] # Iterate over the edges and find the one's that are longer than MAX_EDGE_LENGTH. An edge index # is defined as: # # "The edges are indexed by 4 * polygon + edge where polygon is the polygon index and edge is # the edge index between 0 and 3." # # So, we must revert that here, then measure the edge length, and collect all too long edges. tooLongEdges: list[int] = [] for edgeIndex in selectedEdges: polygonIndex: int = edgeIndex // 4 edgeInPolygonIndex: int = edgeIndex % 4 poly: c4d.CPolygon = polygons[polygonIndex] pointA: c4d.Vector = getPointByIndex(poly, edgeInPolygonIndex) pointB: c4d.Vector = getPointByIndex(poly, (edgeInPolygonIndex + 1) % 4) # Getting the length of a vector is quite expensive, so we compare the squared lengths. edgeLengthSq: float = (pointA - pointB).GetLengthSquared() if edgeLengthSq > MAX_EDGE_LENGTH_SQUARED: tooLongEdges.append(edgeIndex) # Print the indices of the edges that are too long. print("The following edges are too long:", tooLongEdges) # Deselect all edges in the object's edge selection that are too long. for edgeIndex in tooLongEdges: selection.Deselect(edgeIndex) # Push an update event to Cinema 4D to redraw the object. c4d.EventAdd() if __name__ == '__main__': main()

@ferdinand Thank you for your detailed answer.

I get it, thanks for your reply and keeping the idea.
If there are any workarounds or alternative solutions in the meantime, please let me know.
I look forward to any updates regarding this feature in the future.
Cheers~

@i_mazlov I get it, thanks for your reply.

@Dunhou @i_mazlov
Thanks a lot.😊 😊 😊

@ferdinand Wow, thanks a ton for that! Our workflow was working just fine without c4dpy, so I didn't get to check the forum again, but this is very nice.

Happy new year!

Hi @serco, there is multiple way to execute a script automatically when Cinema 4D is opened.

Use python_init.py, this force you to add your script into the temp folder. Bu it can be done for a particular instance of a Cinema 4D or it can also be applied to all Cinema 4D versions that use a given python version. Implement a Plugin and react to PluginMessage various event are sent to Python, and you can hook into them to execute your code. This require to have a Python plugin loaded by Cinema 4D. Depending of your needs there is c4dpy which act as a Python Interpreter, where you can pass directly your Python file as an argument. Then again depending of your need you may be able to start what you want to do next.

Cheers,
Maxime.

Thanks a lot for reporting this kind of issue !
This is going to be fixed in the next update of the doc.

Cheers,
Maxime.

Thank you

@m_adam Thank you very much for your help in the last days! This worked as well as expected 😄

Hi @BretBays Happy Christmas ! Thanks for getting back, and indeed PLUGINFLAG_COMMAND_OPTION_DIALOG is the way to go. Find an example in CommandData with Options Dialog - Docked command button

Cheers,
Maxime.

@ferdinand After a lot of time forced to work on other projects, I have looked further into this, and sent you an email. I hope you don't see it until after the holiday season. 🙂

@m_adam oops, sorry...yeah wrong forum. Went to Cineversity.. thanks

Hi @m_adam, following your typescript example it worked now to connect! Thank you very much for your help 🙂

Merry Christmas and a Happy New Year!

Thank you for the detailed reply, @i_mazlov!

I was unable to determine the root cause of the issue, however I was able to work around it by preloading direct dependencies with a FileExecute call and using the SearchPath Windows function to locate the runtime dependency DLLs and pass the absolute paths to LoadLibrary (I'm aware this is not recommended, but should be fine for this internally used plugin).

I couldn't find anything in the newly added Maxon options that appeared to affect the loading behavior. My only remaining theory is that the new licensing process is indirectly triggering this behavior:
LoadLibrary function returns STATUS_DLL_NOT_FOUND error on impersonate thread in Windows
https://learn.microsoft.com/en-us/troubleshoot/windows-client/setup-upgrade-and-drivers/loadlibrary-function-returns-status-dll-not-found-error-impersonate-thread

Thanks again!
Nick

Hi @Kantronin,

Instead of creating multiple consequent postings please consolidate them in a single one. I've also noticed that you've added "programming" tag but haven't mentioned the language you're talking about (is it c++ or python?).

Regarding your questions. Transforming the axis of a PointObject effectively means transforming the point values. There're some helping commands that I've shown you in my previous message, but what they effectively do is just transforming the points. Please have a look into the operation_transfer_axis_s26.py example, which demonstrates how to perform axis translation.

As for the rotation part, I'd need to point you once again to our Matrix Manual, which actually contains the answer to your question. Namely, the chapter "Constructing and Combining Transforms" explains the usage of functions c4d.utils.MatrixRotX(), c4d.utils.MatrixRotY() and c4d.utils.MatrixRotZ(). I will not copy & paste the same code snippet from our manual, so please check it youself.

Combining these with the example above should do the trick for you, unless you don't have the initial transformation of your ring splines. If that's the case, then your task turns into a way more complex form of the optimization problem.

Please also note, that you can only do the object axis transformations on PointObject (and on PolygonObject since it's inherited from PointObject). This effectively means that if you're using the Osplinecircle instead of an ordinary Ospline, this wouldn't work, as it doesn't store any points inside. In this case you'd need to convert to Ospline. If that's not an option for you, you can check the Geometry Axis and Geometry Orientation scene nodes, as they allow you to transform the axis "on-the-fly", so this would work even with non-point objects.

Cheers,
Ilia

Hi @i_mazlov
I can't use C++ at the moment, so I thought I'd try MultilineEditText for my purposes.
I looked for This post in the forum and now I have some ideas.
Thank you for your reply!

Cheers~